A positive displacement pump operates by trapping a fixed amount of fluid from an intake pipe and then forcing (displacing) that trapped volume into a discharge pipe. LobePro pumps utilize intermeshing 4-wing helical lobes mounted on parallel shafts. The shafts are rotated by gears with a maintenance friendly design (no complicated timing gears to worry about).
As the lobes un-mesh on the intake side, they create a cavity with an expanding volume. Your sludge or slurry flows into the cavity and is trapped by the lobes as they rotate.

LobePro positive displacement rotary lobe pumps are
ideal for pumping sludge, slurries and mud. Here are
several great reasons to choose a LobePro rotary
lobe pump:

Low shear/Pulse free operation

Excellent for oil/water separation or
highly viscous fluids

Ability to pump at constant pressure at
different flow rates

Self-priming to 25' wet

Capacities from 0-2,656 GPM with
pressures to 175 psi

Forward and reverse pumping operation

Easy access to wet-end for in-place wear
part replacement

Long operational lifespan at proper
speed

Low maintenance

Space-saving compact design

10 to 1 turndown capability and reverse
capability

Run dry ability for a period of time

Pump speed can be varied from 50 to 600
RPM

Excellent for fine abrasives such as
sand, sludge and bentonite because the pump
can be run at low speed and lobes do not
touch